Razor blade scraper



Jan. 12, 1943. w. FRANK RAZOR BLADE SCRAPER Filed July 8, 1941 INVENTOR.14 141 MM FPfl/VK Patented Jan. 12, 1943 UNITED STATES PATENT OFFICE 9Claims.

This invention relates to scrapers. More particularly my inventionrelates to an improved construction for scrapers or cutters designed foruse in connection with razor blades.

One of the objects of my invention is to provide an improvedconstruction for razor blade scrapers and cutters which shall be sodesigned that any standard types of razor blades, both single anddouble-edged, may be employed as the scraping or cutting element.

Another object of my invention is to provide a razor blade scraper orcutter of the class described having novel means whereby a razor blademay be readily inserted and held in position for effective use, andwhich shall be additionally so designed, that the sharp cutting edge ofthe blade may readily be placed in a protective position to preventdanger to the user, when not in efiective use, without handling orotherwise dislodging the razor blade from its position.

Still another object of my invention is to provide an improvedconstruction for razor blade scrapers or cutters of the class describedwhich shall be characterized by the simplicity of its parts, the easeand simplicity of the assembly of such parts and its high degree ofpracticality and usefulness.

Other objects of my invention will become apparent in the followingdetailed description thereof.

In the accompanying drawing,

Fig. 1 is a front elevational view of a razor blade scraper or cutterconstructed in accordance with my invention, with a wall portion brokenaway to disclose the interior thereof;

Fig. 2 is a side elevational view thereof, partly insection;

Fig.3 is an enlarged cross-sectional view taken substantially on theline 3-3 of Fig. 1;

Fig. 4 is a cross-sectional view taken substantially on the line 44 ofFig. 2:

Fig. 5 is a, fragmentary view of the device shown in Fig. 1 but with theeffective cutting edge of the razor blade reversed and protectivelyreceived within the holder;

Fig. 6 is a disassembled elevational view of the inner surfaces of thetwo parts comprising the razor blade support;

Fig. '7 is a view similar to Fig. 4 but illustrating the use of asingle-edged blade with my device;

Fig. 8 is an end elevational view thereof, partly in section; and

iii

Fig. 9 is a view similar to Fig. 7, but in elevation and illustrating adifierent position for the razor blade.

Referring now in detail to the drawing I have shown a razor bladescraper or cutter constructed in accordance with my invention andcomprising generally, a razor blade holding member in and a support orhandle member II for said blade holding member.

The blade holding member Ill comprises a pair of substantiallysymmetrical parts l2 and M which may be molded from any suitablemoldable material, such as, for example, the class of material nowgenerally known as plastics. The outer surfaces of the parts l2 and Mare symmetrically tapered downwardly on opposite sides from thelongitudinal axes thereof toward the longitudinal ends, as clearly shownin Figs. 2 and 3. The purpose and function of such tapered outersurfaces will become apparent as the description proceeds.

In accordance with my invention the razor blade holder I0 is constructedin the following manner so that it will removably hold clamped betweenthe parts l2 and I4 any standard type of safety razor blade whether ofthe single-edged or double-edged type. 1

The part I2 is provided with thickened longitudinal end portions I5 andI6 which are designed to meet in abutting relationship withcorrespondingly thickened longitudinal end portions l1 and IB of thepart l4. Between the thickened end portions 15 and I6 disposed onopposite sides of the longitudinal axis of the part l2, are a pair ofparallel spaced ridges l9 and 20. The part I4 is similarly provided withcorrespondingly positioned ridges 2| and 22 in alignment with the ridgesl9 and 20.

It is noted that between the ridge 2| and the portion ll of the part l4and between the ridge l9 and the portion 15 of the part [2 there areformed corresponding and aligned longitudinal recessed areas 24 and 25respectively. Also between the ridge 22 and the portion I8 01 the partl4 and between the ridge 20 and the portion I5 of the part l2 there areformed corresponding and aligned longitudinal recessed areas 26 and 21respectively, The puropses and functions of the pairs of recessed areas24, 25 and 2B, 21 will soon be explained.

One of the thickened longitudinal end portions of the parts l2 or II,such as, for example, the portion l5 of the part I2, is provided with apair of projecting pins 30. It is noted that the inner surfaces of thesaid pins 30 are rounded while the outer surfaces of the said pins 30are squared. The corresponding thickened longitudinal end portion I I ofthe part I4 is provided with openings 3| receiving therein and matinwith the pins 30. The parts l2 and I4 when in terlocked are thusprevented from lateral and axial displacement.

If it is desired to employ a double-edged blade of the type illustratedin Fig. 4 of the drawing and designated by the letter D, the said bladeis placed on the inner surface of the part I2 in such position that thepins 30 are received in the usual center notch of the blade. In suchposition, it is noted, one sharpened edge of the blade and a portionadjacent thereto projects beyond the edge portion I5 of the part I2,while the other sharpened edge and portion adjacent thereto rests withina notched portion I9a of the ridge IS. The ridge 2i of the part I4 isalso provided with a notched portion 2Ia corresponding to the notch I9a.

It is thus seen, that when the part I4 is placed over the part I2 andthe pins 30 are received within the openings 3|, the blade D is heldcaptive between the parts I2 and I4, with one sharpened edge thereofprojecting outwardly from the blade holder I0.

To maintain the blade D in proper position between the parts I2 and I4of the blade holder III, I provide the following construction for thesupport or handle I I.

The said handle II, which may be molded from any suitable moldablematerial similar to that of the blade holder parts I2 and I4, maycomprise a pair of spaced flat front and back walls IIa interconnectedby the side walls He and the bottom wall I Id to form an integral hollowmember open at the top.

In accordance with my invention I provide the front and back walls I Inof the handle with outwardly flared portions lIb adjacent the top openend. The angle formed between the flared wall portions II b issubstantially the same as the angle formed by the outer surfaces of theparts I2 and I4 of the blade holder III so that the latter may befrictionally received and held in the top opening of the handle I I asclearly shown in Figs. 2 and 3. It is noted that the frictional wedgingof the blade holder ID in the top opening of the handle II will causethe parts I2 and I4 to be pressed toward each other to firmly grip theblade therebetween.

I have found that satisfactory results are obtained when there is aslight difference between the angle formed between the flared wallportions IIb and the angle formed by the outer tapered surfaces of theparts I2 and I4. In the drawing I have illustrated one such arrangementin which each flared wall portions IIb tapers at an angle of 9 degrees,while each outer surface portion of the parts I2 and I4 taper at anangle of 10 degrees.

To provide additional resilience and therefore holding power in thehandle between the pressed together parts I2 and I4, I design the ridgesI9, 2| and 20, 22 to be of less height than the end portions I5, I1 andI6, l8 leaving slight spaces A and B between corresponding ridges whenthe parts I2 and I4 are assembled.

It is thus seen from the above described construction that when theblade holder III is forced into the top opening of handle II thematerial of the parts I2 and I4 will permit them to be resilientlybrought together until the above described corresponding ridges meet andsince the tendency of the said ridges will be to separate to the normalposition the blade holder will thereby be held firmly within the handleII, for effective use. I

When the scraper device is not in use, the blade holder III may beremoved from the position shown in Figs. 1 to 3 and turned with theblade D faced downwardly, the sharpened edge of the blade being receivedwithin the hollow of the handle, as shown in Fig. 5. In this way theuser is protected from danger and at the same time the scraping orcutting edge is protected from becoming dulled or nicked.

It is noted that the projecting pins 30 are so positioned with respectto each other and with respect to the usual central notch of thedoubleedged blade D and of the usual end notches of the single-edgedblade as to prevent axial displacement of the blade within the bladeholder. In the case of the double-edged blade the straight outsidesurfaces of the projections 30 will abut the straight transverse wallsof the center notch. When a single-edged blade is used the rounded innersurfaces of the projections may be fitted within the usual end notchesto prevent axial displacement.

In Figs. 7, 8 and 9 I have shown the razor blade scraper or cutter of myinvention adapted for use with a single-edged blade S. The said blade Sis customarily made with a thickened edge T opposite to the sharpened orknife edge. The channels or recessed areas 24, 25 and 26, 21 are made ofa predetermined width to relatively snugly receive the said thickenededge T therein and thus to firmly hold the blade S between the parts I2and I4. When the thickened blade edge T is received in the recess 24,25, the end notches of the blade S will receive the pins 30 therethroughto hold the blade against axial movement. If desired the thickened edgeT may be received in the recess 26, 21 as shown in Figs. '7 and 8 inwhich case there are no pins to be considered and the blade may bepositioned where desired. In Fig. 9 I have shown another position forthe blade S where a portion thereof projects laterally beyond the sideof the device. Such position may be employed where it is desired toreach otherwise inaccessible areas for scraping or for cutting.

The hollow chamber in the handle II formed by the walls Ila, I la andIld may be utilized for protectively storing a supply of new or usedblades.

In accordance with the provisions of the patent statutes, I have hereindescribed the principle and operation of my invention, together withapparatus which I now consider to represent the best embodimentsthereof, but I desire to have it understood that the apparatus shown isonly illustrative and that the invention can be carried out by othermeans. Also, while it is designed to use the various features andelements in the combination and relations described, some of these maybe altered and others omitted without interfering with the more generalresults outlined, and the invention extends to such use.

Having described my invention, what I claim and desire to secure byLetters Patent is:

.1. A razor blade device of the class described comprising a bladeholder, said blade holder comprising a pair of cooperating members forholding a razor blade therebetween, portions of the outer surfaces ofsaid cooperating members being tapered, a handle member having anopening for receiving therein the said tapered portions of saidcooperating members, said opening being tapered to correspondsubstantially to the said tapered portions of said cooperating memberswhereby to irictionally maintain the said blade holder in attachmentwith said handle.

2. A razor blade device of the class described comprising a bladeholder, said blade holder comprising a pair of cooperating members forholding a razor blade therebetween, portions of the outer surface ofsaid blade holder being tapered, a handle member having a taperedopening for receiving therein the said tapered portions of said bladeholder, the degree of taper of said opening and of said blade holderportions being slightly different whereby to frictionally hold the bladeholder in attachment with said handle.

3. In a razor blade device of the class described the combination of ablade holder, a razor blade. said blade holder comprising a pair ofcooperating members for so holding said razor blade therebetween that, acutting edge of the razor will project beyond the said holder, the outeropposite surfaces of said holder being symmetrically tapered from themedial area thereof to the longitudinal edges, a handle member having atapered opening for receiving therein one of the symmetrically taperedparts of said holder to frictionally hold the said holder in attachmentwith said handle, the said symmetrical tapering of said holder making itpossible to remove the blade holder from the handle and reverse theposition of said holder so that the sharpened etdge of the blade will beprotectively received within the said opening when the device is not ineffective use.

4. In a razor blade device of the class described the combination of ablade holder, a razor blade having a notch therein, said blade holdercomprising a pair of cooperative members for holding said razor bladetherebetween, portions of the outer surface of said holder beingtapered, a handle member having a tapered opening for receiving thereinsaid tapered portions of said blade holder to frictionally hold the samein attachment with said handle, a projection on one of said cooperatingblade holder members and a corresponding recess on the other of saidcoopcrating blade holder members for receiving said projection therein,said propection being received in said razor blade notch to preventlateral displacement of said blade.

5. For use in combination with a double-edged razor blade having acentral longitudinal notch, a razor blade device of the class describedcomprising a blade holder, said blade holder comprising a pair ofcooperating members for holding said razor blade therebetween, portionsof the outer surface of said holder being tapered, a

handle member having a tapered opening for receiving therein saidtapered portions of said blade holder to frictionally hold the same inattachment with said handle, a pair of projections on one of saidcooperating blade holder members and a pair of corresponding recesses onthe other of said cooperating blade holder members for receiving saidprojections therein, said projections passing through said centralnotch, to prevent displacement of said blade with respect to said bladeholder.

6. For use in combination with a single-edged razor blade having asharpened edge and a thickened heel portion at the opposite edge, arazor blade device of the class described comprising a blade holder,said blade holder comprising a pair of cooperating members for holdingsaid razor blade therebetween, a longitudinal recess on the innersurface of one of said pair of cooperating members for receiving thereinthe said heel portion of said blade, the sharpened edge of said bladeprojecting beyond said blade holder, portions of the outer surface ofsaid holder being tapered, a handle member having a tapered opening forreceiving therein said tapered portions of said blade holder tofrictionally hold the same in attachment with said handle.

7. In a razor blade device of the class described, in combination, ablade holder comprising a pair of cooperating parts for clamping a razorblade therebetween, a handle member, and means for mounting said bladeholder on said handle solely by frictional means.

8. In a razor blade device of the class described, in combination, ablade holder for removably holding a razor blade, a handle member, andmeans for frictionally and removably attaching said blade holder to saidhandle member, said means comprising a tapered opening in said handlemember for receiving therein a substantially correspondingly taperedportion of said blade holder.

9. A razor blade device according to claim 2 in which there is provideda ridge on the inner surface of each of said cooperating members, saidridges being in closely ofiset relation and respectively normally spacedfrom the adjacent cooperating member so that when the said cooperatingmembers are in contacting engagement for holding a blade therebetweenthe wedging action of frictionally receiving the tapered portion of theblade holder in the tapered handle member opening will cause the saidcooperating members to resiliently move toward each other to moretightly wedge the blade holder in the handle opening.

WILLIAM FRANK.

